A network of gig workers around the world is unwittingly providing basic intelligence to the U.S. military, using a consumer smartphone app called Premise. Reporter Byron Tau joins host Amanda Lewellyn to discuss how the app works, and how it's one of a growing number of companies that take advantage of the proliferation of mobile phones. Plus, a note about a big change coming to Tech News Briefing. Learn more about your ad choices. Visit megaphone.fm/adchoices